Commands Working In Terminal, But Not In Bash Script - arrays

Question

I'm sysadmin for couple of webservers deployed with cpanel hosting panel. I'm trying to finish up with a backup script. There are two commands bundled with Cpanel, that will be used in this script. These commands are;
1. whmapi1 modifyacct user=USERNAME BACKUP=[01]
This Command has booleans to set, what it does is either enable or
disable backup for a specific user.
2. /usr/local/cpanel/bin/backup --force
Once backup is enabled for a user/users, then this command starts the
backup process on the server.
So here is my script logic & the script.
#!/bin/bash
Arrays
L=($( comm -23 <(du -h --max-depth=1 /home 2>/dev/null | grep G | awk -F"/" '{print $NF}' | sort | egrep -vw '(home|virtfs)') <(ls -al /var/cpanel/suspended/ | grep -v 'lock' | sort) ))
Above Array contains all the account whose home directories have
exceeded 1GB limit.
S=($(comm -23 <(du -h --max-depth=1 /home 2>/dev/null | egrep -v '(!G|.cp|cP|clamav)' | awk -F"/" '{print $NF}' | sort | egrep -vw '(home|virtfs)') <(ls -al /var/cpanel/suspended/ | grep -v 'lock' | sort) ))
Above Array contains all the account whose home directories are less
than 1GB limit.
whmapi1 modifyacct user=${L[#]} BACKUP=0 && whmapi1 modifyacct user=${S[#]} BACKUP=0
Above command disables backup for all users for start, to start from
scracth.
whmapi1 modifyacct user=${S[#]} BACKUP=1
T
his command enables backup for all accounts whose home dirs are less
than 1 GB
/usr/local/cpanel/bin/backup --force
This command starts backup process for all enabled users.
The logic is, that I want to create backup of small accounts first, and then when it's finished, I'll run it for larger accounts.
PROBLEM: all commands execute successfully when run directly in terminal, but it doesn't when run via a script. Problem occurs at account enabling & disabling.
It either disables all or enables all, and not the partial accounts, as intended by the logic of the script.
Can anyone point out, where & what I'm missing?
Thanks in advance !!

Answer 1

${l[#]} exands to user1 user2 user3 ..., so user=${L[#]} expands to user=user1 user2 user3 ..., if you want to fun foreach user, you need to loop over users.
du_buff=$(du -h --max-depth=1 /home 2>/dev/null)
lock_buff=$(ls -al /var/cpanel/suspended/ | grep -v 'lock' | sort)
L=($(comm -23 <(echo "$du_buff" | grep G | awk -F"/" '{print $NF}' | sort | egrep -vw '(home|virtfs)') <(echo "$lock_buff") ))
S=($(comm -23 <(echo "$du_buff" | egrep -v '(!G|.cp|cP|clamav)' | awk -F"/" '{print $NF}' | sort | egrep -vw '(home|virtfs)') <(echo "$lock_buff") ))
# for every user in L and S
for user in "${L[#]}" "${S[#]}"; do
whmapi1 modifyacct user=$user BACKUP=0
done
# for every user in S
for user in "${S[#]}"; do
whmapi1 modifyacct user=$user BACKUP=1
done
/usr/local/cpanel/bin/backup --force